Retrograde Melting in Transition Metal-silicon Systems PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Retrograde Melting in Transition Metal-silicon Systems PDF full book. Access full book title Retrograde Melting in Transition Metal-silicon Systems by David P. Fenning. Download full books in PDF and EPUB format.
Author: David P. Fenning
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
Get Book Here
Book Description
A theoretical framework is presented in this work for retrograde melting in silicon driven by the retrograde solubility of low-concentration metallic solutes at temperatures above the binary eutectic. High enthalpy of formation of point defects in silicon leads to retrograde solubility for a number of solutes, including many 3d transition metals. The Ni-Si system is used to demonstrate that in silicon under supersaturated conditions, such solutes precipitate out into liquid droplets. Synchrotron-based Xray Absorption Microspectroscopy measurements provide experimental confirmation of such phase transitions and the underlying thermodynamics. Finally, the potential for using retrograde melting to improve the electronic minority carrier lifetime of low quality silicon solar cell materials is considered.
Author: David P. Fenning
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
Get Book Here
Book Description
A theoretical framework is presented in this work for retrograde melting in silicon driven by the retrograde solubility of low-concentration metallic solutes at temperatures above the binary eutectic. High enthalpy of formation of point defects in silicon leads to retrograde solubility for a number of solutes, including many 3d transition metals. The Ni-Si system is used to demonstrate that in silicon under supersaturated conditions, such solutes precipitate out into liquid droplets. Synchrotron-based Xray Absorption Microspectroscopy measurements provide experimental confirmation of such phase transitions and the underlying thermodynamics. Finally, the potential for using retrograde melting to improve the electronic minority carrier lifetime of low quality silicon solar cell materials is considered.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Retrograde melting (melting upon cooling) is observed in silicon doped with 3d transition metals, via synchrotron-based temperature-dependent X-ray microprobe measurements. Liquid metal-silicon droplets formed via retrograde melting act as efficient sinks for metal impurities dissolved within the silicon matrix. Cooling results in decomposition of the homogeneous liquid phase into solid multiple-metal alloy precipitates. These phenomena represent a novel pathway for engineering impurities in semiconductor-based systems.
Author: Rajiv Kohli
Publisher: William Andrew
ISBN: 0323431739
Category : Science
Languages : en
Pages : 193
Get Book Here
Book Description
Developments in Surface Contamination and Cleaning, Volume Ten, provides a state-of-the-art guide to the current knowledge on the behavior of film-type and particulate surface contaminants and their cleaning methods. This newest volume in the series discusses mechanisms of particle adhesion, particle behavior in liquid systems, and metallic contamination and its impact. In addition, the book includes a discussion of the types of contaminants, with resources to deal with them and information on environmental issues related to surface contamination and cleaning. Taken as a whole, the series forms a unique reference for professionals and academics working in the area of surface contamination and cleaning that also includes information on cleaning at the micro and nano scales. - Written by established experts in the contamination field that provide an authoritative resource - Presents a comprehensive review of new trends in contaminants and resources for dealing with those contaminants - Contains detailed case studies to illustrate various scenarios
Author: H. M. Colquhoun
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: E. Rudy
Publisher:
ISBN:
Category :
Languages : en
Pages : 732
Get Book Here
Book Description
This report contains a summary of phase diagram work conducted over the time period from 1 January 1964 through April 1969. Systems studied include binary transition metal systems, binary and ternary systems of refractory transition metals with carbon, boron, silicon, and nitrogen, and selected concentration-temperature sections of higher order systems involving the same elements.
Author: Air Force Materials Laboratory (U.S.). Metals and Ceramics Division
Publisher:
ISBN:
Category : Phase diagrams
Languages : en
Pages :
Get Book Here
Book Description
Author: W. Hayes
Publisher: Courier Corporation
ISBN: 0486160882
Category : Science
Languages : en
Pages : 500
Get Book Here
Book Description
This extensive survey covers defects in nonmetals, emphasizing point defects and point-defect processes. It encompasses electronic, vibrational, and optical properties of defective solids, plus dislocations and grain boundaries. 1985 edition.
Author:
Publisher: John Wiley & Sons
ISBN: 1118514602
Category : Science
Languages : en
Pages : 420
Get Book Here
Book Description
The development of solid state devices began a little more than a century ago, with the discovery of the electrical conductivity of ionic solids. Today, solid state technologies form the background of the society in which we live. The aim of this book is threefold: to present the background physical chemistry on which the technology of semiconductor devices is based; secondly, to describe specific issues such as the role of defects on the properties of solids, and the crucial influence of surface properties; and ultimately, to look at the physics and chemistry of semiconductor growth processes, both at the bulk and thin-film level, together with some issues relating to the properties of nano-devices. Divided into five chapters, it covers: Thermodynamics of solids, including phases and their properties and structural order Point defects in semiconductors Extended defects in semiconductors and their interactions with point defects and impurities Growth of semiconductor materials Physical chemistry of semiconductor materials processing With applications across all solid state technologies,the book is useful for advanced students and researchers in materials science, physics, chemistry, electrical and electronic engineering. It is also useful for those in the semiconductor industry.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
Get Book Here
Book Description
A complete phase diagram of the system molybdenum-carbon is presented. A thermodynamic model for the description of the phase separations of the Me2C phases in transition metal-carbon systems has been developed and was semiquantitatively applied to Mo2C. Literature data on thermodynamic properties of molybdenum carbides have been critically evaluated and data were selected. Apparative techniques for the precise study of phase reactions at high temperatures are described.
Author: Sergio Pizzini
Publisher: John Wiley & Sons
ISBN: 1118312163
Category : Technology & Engineering
Languages : en
Pages : 412
Get Book Here
Book Description
Today, the silicon feedstock for photovoltaic cells comes from processes which were originally developed for the microelectronic industry. It covers almost 90% of the photovoltaic market, with mass production volume at least one order of magnitude larger than those devoted to microelectronics. However, it is hard to imagine that this kind of feedstock (extremely pure but heavily penalized by its high energy cost) could remain the only source of silicon for a photovoltaic market which is in continuous expansion, and which has a cumulative growth rate in excess of 30% in the last few years. Even though reports suggest that the silicon share will slowly decrease in the next twenty years, finding a way to manufacture a specific solar grade feedstock in large quantities, at a low cost while maintaining the quality needed, still remains a crucial issue. Thin film and quantum confinement-based silicon cells might be a complementary solution. Advanced Silicon Materials for Photovoltaic Applications has been designed to describe the full potentialities of silicon as a multipurpose material and covers: Physical, chemical and structural properties of silicon Production routes including the promise of low cost feedstock for PV applications Defect engineering and the role of impurities and defects Characterization techniques, and advanced analytical techniques for metallic and non-metallic impurities Thin film silicon and thin film solar cells Innovative quantum effects, and 3rd generation solar cells With contributions from internationally recognized authorities, this book gives a comprehensive analysis of the state-of-the-art of process technologies and material properties, essential for anyone interested in the application and development of photovoltaics.
